Pg Blazer - Online Test Series 19 - Orthopaedics

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Subject wise MCQ test - Orthopaedics. For more online practice tests, go to PG Blazer Online Test Series.


Questions and Answers
  • 1. 

    A 15 year old boy is injured while playing cricket. X-rays of the leg rule out of a possible fracture. The radiologist reports the boy has an evidence of aggressive bone tumor with both bone destruction and soft tissue mass. The bone biopsy reveals a bone cancer with neural differentiation. Which of the following is the most likely diagnosis?

    • A.

      Chondroblastoma

    • B.

      Ewing‘s sarcoma

    • C.

      Neuroblastoma

    • D.

      Osteosarcoma

    Correct Answer
    B. Ewing‘s sarcoma
    Explanation
    Ewings sarcoma has a neural differentiation. Neuroblastoma may present with skeletal metastasis, but is seen in children less than 5 years old.

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  • 2. 

    The differential diagnosis of lesion, histologically resembling giant cell tumour in the small bones of the hands or feet, includes all of the following except:

    • A.

      Aneurysmal bone cyst

    • B.

      Fibrosarcoma

    • C.

      Osteosarcoma

    • D.

      Hyperparathyroidism

    Correct Answer
    B. Fibrosarcoma
    Explanation
    Histological differential diagnosis of giant cell tumour

    Brown tumour of hyperparathyroidism
    Non ossifying fibroma
    Giant cell reparative granuloma
    Benign fibrous histiocytoma
    Aneurysmal bone cyst
    Osteosarcoma with prominent giant cells
    Metastatic carcinoma with giant cells

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  • 3. 

    All are true regarding brachial plexus injury, except:

    • A.

      Preganglionic lesions have a better prognosis than postganglionic lesions

    • B.

      Erb’s palsy causes paralysis of the abductors and external rotators of the shoulder

    • C.

      In Klumpke‘s palsy, Horner’s syndrome may be present on the ipsilateral side

    • D.

      Histamine test is useful to differentiate between the preganglionic and postganglionic lesions

    Correct Answer
    A. Preganglionic lesions have a better prognosis than postganglionic lesions
    Explanation
    Preganglionic lesions have a poor prognosis. They do not recover and cannot be corrected surgically.

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  • 4. 

    All of the following statements are true about development dysplasia (DDH) of the hip, except:

    • A.

      It is more common in females

    • B.

      Oligohydramnios is associated with a higher risk of DDH

    • C.

      The hourglass appearance of the capsule may prevent a successful closed reduction

    • D.

      Twin pregnancy is a known risk factor

    Correct Answer
    D. Twin pregnancy is a known risk factor
    Explanation
    DDH of the hip is a condition where the hip joint fails to develop properly. It is more common in females, as stated in the first option. Oligohydramnios, which is a condition characterized by low levels of amniotic fluid, is associated with a higher risk of DDH, as stated in the second option. The hourglass appearance of the capsule may prevent a successful closed reduction, meaning that it can hinder the process of manually reducing the hip joint, as stated in the third option. However, twin pregnancy is not a known risk factor for DDH, making it the exception among the given statements.

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  • 5. 

    The ideal treatment of bilateral idiopathic clubfoot in a newborn is:

    • A.

      Manipulation by mother

    • B.

      Manipulation and Dennis Brown splint

    • C.

      Manipulation and casts

    • D.

      Surgical release

    Correct Answer
    A. Manipulation by mother
    Explanation
    Manipulation by the mother is the only recommended treatment in a neonate with idiopathic clubfoot. Corrective plaster application / strapping is tried after 4 weeks of age.

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  • 6. 

    “Rugger Jersey Spine” is seen in:

    • A.

      Fluorosis

    • B.

      Achondroplasia

    • C.

      Renal osteodystrophy

    • D.

      Marfan’s syndrome

    Correct Answer
    C. Renal osteodystrophy
    Explanation
    Renal osteodystrophy is a condition that affects the bones due to chronic kidney disease. It is characterized by abnormalities in bone mineralization and structure. "Rugger Jersey Spine" refers to a radiographic finding where the vertebral bodies appear dense and have a characteristic striped or banded appearance, resembling the stripes on a rugby jersey. This finding is commonly seen in renal osteodystrophy due to the abnormal deposition of calcium and phosphate in the bones.

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  • 7. 

    Which of the following conditions is least likely to present as an eccentric osteolytic lesion:

    • A.

      Aneurysmal bone cyst

    • B.

      Giant cell tumor

    • C.

      Fibrous cortical defect

    • D.

      Simple bone cyst

    Correct Answer
    D. Simple bone cyst
    Explanation
    Simple bone cyst presents as a central lytic lesion.

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  • 8. 

    All the statements are true about exotosis, except

    • A.

      It occurs at the growing end of bone

    • B.

      Growth continues after skeletal maturity

    • C.

      It is covered by cartilaginous cap

    • D.

      Malignant transformation may occur

    Correct Answer
    B. Growth continues after skeletal maturity
    Explanation
    Growth of an exostosis stops with stoppage of growth at epiphyseal plate. (It is not a true neoplasm)

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  • 9. 

    Brown tumors are seen in:

    • A.

      Hyperparathyroidism

    • B.

      Pigmented villonodular synovitis

    • C.

      Osteomalacia

    • D.

      Neurofibromatosis

    Correct Answer
    A. Hyperparathyroidism
    Explanation
    Brown tumors, also known as osteoclastomas, are a rare manifestation of hyperparathyroidism. They occur due to excessive parathyroid hormone (PTH) production, which leads to increased bone resorption. The excessive bone resorption causes the formation of cyst-like lesions filled with fibrous tissue, blood, and hemosiderin, giving them a brown appearance. These tumors can occur in any bone but are most commonly seen in the spine, pelvis, and long bones. Other conditions listed, such as pigmented villonodular synovitis, osteomalacia, and neurofibromatosis, are not typically associated with the development of brown tumors.

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  • 10. 

    Which of the following malignant tumors is radioresistant?

    • A.

      Ewing’s sarcoma

    • B.

      Retinoblastoma

    • C.

      Osteosarcoma

    • D.

      Neuroblastoma

    Correct Answer
    C. Osteosarcoma
    Explanation
    Osteosarcoma is highly radioresistant

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